Problems with used iPhone 3gs i just bought

[TexasAssassin]

I bought a white 16GB iPhone 3GS, it is jailbroken and everything works fine but when i put in my sim card from my iPhone 3G it says "searching" then "No service". I was wondering if there was anyway to diagnose the problem without having to restore the phone. Is there something i can check within the phone the will give me information on what's wrong?

 

[Crystal-RX]

I bought a white 16GB iPhone 3GS, it is jailbroken and everything works fine but when i put in my sim card from my iPhone 3G it says "searching" then "No service". I was wondering if there was anyway to diagnose the problem without having to restore the phone. Is there something i can check within the phone the will give me information on what's wrong?

Please provide what baseband(modem firmware) you have on this 3GS.

Setting>General>about>Modem firmware.

Once we have this info, we can give you advise how to get it works.

 

[Applejuiced]

And are you trying to use it on official carrier or JB and unlocked?

 

[TexasAssassin]

Modem Firmware is 05.14.02 and i use official AT&T. Im moving my sim from a iphone 3g, so i have the iphone plan with AT&T.

Thanks for the reply

 

[Applejuiced]

Why not restore it thru iTunes?